Products
Nyanzvi mukugadzira propargyl doro, 1,4 butynediol uye 3-chloropropyne.
Kugadzirwa kwe1, 4-butanediol (BDO) ne maleic anhydride nzira
Maitiro esterification uye hydrogenation ye maleic anhydride yakagadziriswa naDavy Mckee Kambani kuUnited Kingdom.Inosanganisira matanho matatu: (1) maitiro pakati pe maleic anhydride uye ethanol;② BDO yakagadzirwa ne hydrolysis ye diethyl maleic acid;③ Kupatsanurwa uye kunatswa kwezvakaita zvigadzirwa.Chiyero cheBDO, GBL uye THF chinogona kuchinjwa nekugadzirisa mamiriro ekuita.Nekuda kwemubhadharo mukana wekugadzirwa kweBDO, michina mitsva yakawanda yakavakwa neichi chiitiko mumakore achangopfuura, inova iriwo nzira huru yekusimudzira yeBDO kugadzirwa maitiro.Esterification reaction:
Hydrogenation reaction
Parizvino, kunewo n-butane-maleic anhydride maitiro, ayo anotanga kugadziriswa negasi chikamu oxidation ye n-butane kuburitsa maleic anhydride, uye ipapo maleic anhydride inoiswa esterfied ne methanol kugadzira dimethyl maleate.Shanduko ye maleic anhydride inogona kusvika 100% pasi peiyo catalyst yakakodzera.Pakupedzisira, BDO inogadzirwa nehydrogenation uye hydrolysis yeiyo maleic anhydride catalyst.Zvakanakira nzira iyi ndezvekuti zviri nyore kuparadzanisa tsvina senge methanol nemvura mushure meesterification, uye mutengo wekuparadzanisa wakaderera.Uyezve, kushata kwe dimethyl maleate kunowedzerwa, izvo zvinoita kuti mashandiro egasi chikamu hydrogenation nhanho ive yakafara, uye chiyero chekushandura methanol esterification chiri pamusoro pe99.7%.Nokudaro, hapana dambudziko rekutanga rekuchenesa re diethyl maleate.Naizvozvo, hazvifanirwe kudzokorodza ese asina kubatwa maleic anhydride uye mono-methyl ester, asi chete yakachena methanol, iyo inorerutsa maitiro ekugadzira uye inoderedza zvakanyanya kuisirwa kwese kwepurojekiti zvichienzaniswa neyakapfuura tekinoroji.
